How to Choose a Shipping Container: Type, Size, Condition and Other Factors

Before searching for a container

Shipping containers are known by many names, including storage containers, freight containers, sea cans, intermodal boxes, or Conex boxes, but they all share the same standardized steel frame and weatherproof construction.

What sets them apart are their design, price, and condition, which largely determine how each container is used.

Your intended purpose determines not only which container type you should look for but also its size, condition, and certification. A clear understanding of your project will help you narrow options early and avoid paying for features you don’t need.

Common container uses include:

• International shipping: For exporting goods by sea or land, you’ll need a container with a valid CSC plate and a cargo-worthy (CW) inspection. These units meet international safety standards and can be stacked, lifted, and sealed for transport.
• On-site storage: When the container will stay put, certification isn’t necessary. A wind- and watertight (WWT) container keeps your materials, tools, or personal items secure and protected from weather. Focus on roof condition, door alignment, and flooring instead of minor cosmetic flaws.
• Container conversions: Offices, pop-up shops, studios, or workshops all start with a straight, solid box. Select a container with minimal rust, a level frame, and smooth-operating doors. These details make later cutting, insulating, and finishing far easier.
• Cold storage: If your goods need refrigeration or temperature control, a reefer container is the right choice. These insulated units can heat or cool, but they require a reliable power source and regular servicing.
• Temporary or mobile projects: For relocatable uses like construction site offices, exhibitions, or event setups, prioritize accessibility and transport ease. Smaller 20-foot units or double-door containers are easier to move and position.

Once you know what you buy the container for, the next step is understanding the different container types available

Choosing a container step by step

Finding the right shipping container is easiest when you break the process into clear steps. Follow this order to make a confident, informed decision:

1. Select the container type: Choose between dry cargo, refrigerated, open-top, flat-rack, or special-access designs based on how you’ll load, store, or transport your goods.
2. Decide on size and dimensions: Review both external and internal measurements to ensure the container fits your space and capacity needs. Consider High Cube models for extra height or conversions.
3. Evaluate condition and grading: Compare one-trip, cargo-worthy, wind- and watertight, or refurbished options. Balance cost, appearance, and lifespan with your intended use.
4. Choose a reliable supplier: Work with a company that provides inspection reports, real photos, and warranty coverage like Viva Container, which ensures every unit is verified, graded, and delivered with care.
5. Select your container’s delivery method: Choose how your container will be delivered and unloaded. This could be done by tilt-bed truck, crane, or flatbed. The right method depends on your site access, ground conditions, and available equipment.

Now let's explore each step in detail, starting with the foundation of your decision: container type.

1. Select the container type

Containers may look similar from the outside, but their construction and features vary depending on what they’re meant to carry or stored.

The right container type can make loading easier, protect temperature-sensitive goods, or provide better access for conversions and daily use:

Dry cargo containers

These standard all-steel boxes serve as the workhorses of general freight and storage. Built for durability and weather resistance, they're available in every common size and represent the most popular choice for first-time buyers.

Refrigerated (reefer) containers

Reefers are insulated and equipped with built-in refrigeration units that can maintain temperatures roughly between −30 °C and +30 °C. Inside, an aluminum T-floor channels air for even cooling, and multi-lip door gaskets maintain a tight seal.

Reefers weigh more and have slightly less internal volume than dry containers because they house machinery and insulation. They require 380 – 480 V, three-phase power or a diesel generator for mobile use.

Open-top, flat-rack, and specialized units

Beyond standard boxes, specialized containers are designed to handle unique cargo challenges and access requirements:

• Open-top containers allow crane loading of tall or irregular cargo.
• Flat-rack containers carry over-width machinery, vehicles, or tanks.
• Double-door containers open at both ends for first-in/first-out loading.
• Side-door containers provide full-length access. This is ideal for retail pop-ups or shelving.

When choosing among the the different types of shipping containers, consider loading method, access frequency, and whether your site can handle the extra footprint or equipment.

Choosing tips

To narrow down which container type fits your project best, match your primary need to the right design:

• If you’re storing general goods or planning a standard conversion, a dry cargo container is almost always the most cost-effective choice.
• For temperature-sensitive products like food or pharmaceuticals, choose a refrigerated (reefer) unit with reliable power access.
• When handling oversized cargo or using cranes, open-top or flat-rack containers make loading easier.
• Need quick or walk-through access? Double-door or side-door models save time on sites with frequent loading and unloading.
• And if you’re working on a creative or specialized project , start with a High Cube for extra headroom and flexibility.

2. Decide on size and dimensions

Container sizing is standardized across the shipping industry, but the right choice depends on how much space you need inside, how much weight you’ll load, and where the unit will be placed. Every container has both external dimensions, which affect transport and placement, and internal dimensions, which determine usable storage volume.

The most common options are 20-foot, 40-foot, and 40-foot High Cube (HC) containers. However, depending on your supplier, you may also find 10-foot, 45-foot, 48-foot, and other models. For a full overview of standard container measurements, see our Container sizes guide.

20-foot containers

20-foot containers offer about 1,156 cubic feet of internal volume and roughly 150 sq ft of floor area. With a maximum payload of around 62,350 lbs, these containers are ideal for heavy, dense materials such as machinery, metal stock, or construction tools. Its smaller footprint makes delivery and placement easier in driveways or narrow sites.

40-foot containers

40-foot standard containers nearly double the space, providing about 2387 cubic feet and roughly 285 sq ft of floor area. Payload capacity is slightly lower (53,000–54,000 lb) due to higher tare weight, but the cost per cubic meter of storage is usually better than a 20-foot when delivery costs are similar.

High cube containers

High Cube containers share the same footprint as standard models but add roughly 12 inches (about 1 foot) of internal height. They are available in 40-foot and, less commonly, 20-foot and 45-foot lengths.

This extra height increases internal volume significantly, offering more headroom for stacked pallets, tall equipment, or interior build-outs with insulation and lighting. Because of their added space, High Cubes are especially popular for conversions, workshops, and modular offices, where ceiling height greatly improves comfort and usability.

Keep in mind that a container's added height can affect transport, so always check bridge and overhead clearance during delivery.

Choosing tips

• A 20-foot container suits sites with limited space or projects requiring heavy loads in a compact footprint.
• A 40-foot or High Cube container is better for maximizing volume and reducing cost per cubic meter of storage.
• If you plan to move containers frequently or fit them into confined areas, shorter units are easier to handle. For stationary use or build projects, larger and taller units give better long-term value.

3. Select condition and inspection grade

Once you’ve decided on container size and type, the next factor to consider is its condition. A container’s grade directly affects its price, lifespan, and how suitable a container is for freight, storage, or conversion. Understanding what each grade means will help you compare listings confidently and avoid surprises when the container arrives.

One-trip (new)

One-trip containers are essentially new - they’ve made a single journey from the factory to its destination. These units are clean, structurally perfect, and have minimal cosmetic wear. They’re ideal for long-term use, resale value, or projects where the container’s appearance matters, such as offices or retail conversions. Though more expensive, they offer the longest container lifespan and least maintenance.

Cargo-worthy (CW)

Cargo-worthy containers are used units that have been inspected and certified to meet international shipping standards. While shipping container rust or dents may be visible on the exterior, their structural integrity remains strong and watertight. They carry a valid CSC plate, meaning they can legally be used for international transport. For export, logistics, or heavy-duty storage, cargo-worthy containers are the most cost-efficient option.

Wind and water-tight (WWT)

Containers rated wind and water-tight are no longer certified for shipping but are still sealed against weather and pests. They are one of the most popular containers for storage projects, workshops, or material protection on construction sites. Expect visible wear such as paint fading, small dents, or minor rust. Always inspect the doors, roof, and flooring closely, as those areas are most prone to wear.

As-is and refurbished

As-is containers are sold in their current state, often with visible defects or missing parts. They’re best for buyers who plan to repair, cut, or repurpose the unit for non-structural projects.

Refurbished containers fall between used and new. They've been repaired, repainted, and resealed. This makes them a smart choice when you need solid weather protection but don’t want to pay new-unit prices.

Choosing tips

• If you want a container that looks professional and lasts decades, go for a one-trip unit.
• For dependable performance at a lower cost, choose a cargo-worthy container. It balances certification, structural integrity, and value.
• If your container will never be shipped, a wind and water-tight unit is usually sufficient.
• And if you’re customizing or using it temporarily, refurbished or as-is options can stretch your budget further.
• Always include transport, delivery, and site preparation in your final cost comparison. They can easily shift the total more than the container grade itself.

4. Find a Reliable Supplier

Even the best container choice can turn into a poor investment if the supplier isn’t dependable. A reliable dealer ensures that the container you pay for matches the description, is delivered safely, and meets your intended standards. Because the second-hand container market is vast and varied, choosing the right company is just as important as selecting the right box.

What to look for

A professional container supplier should provide:

• Clear photos and serial numbers of the exact unit you’re buying, not stock images.
• A dated inspection report or grade confirmation (One-Trip, CW, WWT, etc.).
• Proof of a valid CSC plate for cargo-worthy containers.
• Transparent delivery terms, including truck type, unloading method, and what happens if access is limited.
• Responsive customer support that can clarify condition, availability, and delivery timelines before payment.

Avoid sellers who can’t provide documentation, delay answers, or push you to commit without inspection details. Good container suppliers make the buying process easy to understand and stand behind the product they deliver.

Why choose Viva Container

For buyers who want reliability from start to finish, Viva Container offers a strong combination of product range, transparent pricing, and local logistics support. We supply both new and used containers, including specialized types such as high cubes, open-side, and double-door units.

Every shipping container sold by Viva Container is inspected, graded, and photographed, ensuring that what you see online matches what’s delivered. Our team also helps customers plan transport and placement, verifying site access and equipment needs in advance.

In addition, all containers come with a warranty against structural defects and leaks, giving buyers peace of mind that their investment is protected. For more details, please refer to our Terms and Conditions.

Viva Container provides consistent quality, verified condition reports, and reliable delivery making it a dependable container supplier for first-time buyers and experienced operators alike.

5. Select your container’s delivery method

Your container buying journey doesn’t end when you purchase it. Proper delivery and placement are essential for a safe, trouble-free setup. The best delivery option depends on access space, surface type, and how the container will be used afterward.

Main delivery options

Once you've selected your container, the final step is getting it safely to your site.

• Tilt-Bed (Rollback) Truck: The most common delivery method for single containers. The truck bed tilts, allowing the container to slide gently into place. It requires clear space equal to the container’s length plus a few extra meters for maneuvering.
• Short 20ft Truck (Tow Truck): Suitable for smaller containers or locations with limited space. Compact and easy to maneuver, it works well for quick, local deliveries.
• Flatbed Trailer: Ideal for long-distance hauls or when the recipient has offloading equipment on-site (e.g., forklift or crane). It’s efficient for multiple-container deliveries to the same location.

Site preparation

Before delivery, make sure your site is ready:

• The ground should be level, firm, and stable. Gravel, asphalt, or concrete pads work best.
• Overhead clearance must accommodate both the container and truck (usually 4 - 5 meters minimum).
• Check turning space and gate width; trucks often need more room than expected.

Proper preparation not only prevents costly delays but also ensures your container sits securely, drains correctly, and remains accessible for years of use.

Importance of budget considerations

Shipping container pricing can vary significantly depending on market conditions, location, and delivery logistics. A realistic budget should account for more than just the sticker price.

Several key factors influence how much you’ll pay for a shipping container:

• Size and type: Larger units and specialized models (like reefers or open-tops) generally cost more than standard dry containers.
• Condition and grade: One-trip containers are the most expensive, while used or WWT units offer strong value for budget-conscious buyers.
• Market cycles: Global shipping demand directly impacts supply. When trade slows, more one-trip units reach the market and prices drop; when demand spikes, availability tightens.
• Depot location and distance: Delivery costs often make up a large part of the total price. The farther your site is from a major depot, the higher the transport fee.
• Delivery method: Standard tilt-bed delivery is the most cost-effective. Sites with limited access may require a crane or HIAB, which increases total cost.

When planning your budget, it’s also helpful to consider whether ownership is truly necessary for your project. In some situations, especially short-term storage or temporary job sites, renting can offer the same functionality at a lower upfront cost. To understand which option suits your needs best, see our guide on how to choose between buying or renting a shipping container.

Container Recommendations for Common Use Cases

Once you understand container types, sizes, condition grades, and budget ranges, the final step is matching your needs to real-world applications. Containers serve a wide variety of purposes, from shipping and everyday storage to complex conversions, and choosing the right configuration will save you both time and money down the line.

Below are some of the most common use cases and the container types best suited for each.